United States Nuclear Regulatory Commission - Protecting People and the Environment

ACCESSION #: 9505190154

                         Boeing Computer Services
                         P.O. Box 24346
                         Seattle, WA 98124-0346

BOEING

May 5, 1995
G-1151-RSO-95-199

Document Control Desk
United States Nuclear Regulatory Commission
Washington, D.C.  20555

Reference:     a)   Boeing Letter G-1151-RSO-92-365 dated August
31,
                    1992; R. S. Orr to the NRC Operations Center

               b)   NRC Letter Docket No. 99901227 dated August
12, 1992;
                    L. J. Norrholm to R. S. Orr; Subject:
Response to 10
                    CFR 21 Inquiry

Dear Sir or Madam:

In accordance with the reference correspondence and 10 CFR 21,
Boeing is
sending the NRC the attached error notice(s) received from our
former
software suppliers.  Because of unknown current addresses, the
following
former customers were not notified:

     Reactor Controls, Inc.

     Echo Energy Consultants, Inc.

     Nuclear Applications and Systems Analysis Company (Japan)

     Nuclear Power Services

Error notices have been sent to our other former customers.

Very truly yours,

R. S. Orr
Nuclear Administrator
G-1151 M/S 7A-33
(206) 865-6248

Attachment(s): ANSYS Class3 Error Reports 95-16, 95-17, 95-18,
95-19, and
               95-20.  Also ANSYS Class3 Error Summary Reports
for Rev.
               5.0A and Rev 5.1

ANSYS (Registered Trademark)

                         ANSYS, Inc.
                         201 Johnson Road         Telephone
412.746.3304
                         Houston, PA 15342-1300   Facsimile
412.746.9494

                              April 27, 1995

Dear Class3 Error Recipient:

     Attached you will find ANSYS Class3 Error Reports 95-16,
95-17, 95-
18, 95-19 and 95-20.

     Also enclosed are ANSYS Class3 Error Summary Reports for
Rev. 5.0A
and Rev. 5.1 of the ANSYS program.  For your convenience, these
reports
have been sorted by Class3 Error Report Number and by Keyword.

                              Sincerely,

                              ANSYS, Inc.

                              Prashant Ambe
                              Quality Assurance Manager

Enclosures

                  ANSYS Revision Identifier Description

     ANSYS revision identifiers consist of a major revision
level, a
minor revision level, a correction level, and occasionally a
special
version level.  An example of how this is constructed is shown
below:

                             Figure omitted.

     Major revision level changes indicate that new features have
been
added to the program and that some level of program architecture
change
and/or file structure has occurred.  Minor revision level changes
also
indicate that new features have been added to the program, but
files are
upwardly compatible.  All known error fixes are included in both
minor
and major revisions.  Changes to the correction level indicate
that it is
primarily an error correction release.  Special version
identifiers
indicate that one or more additional minor changes have been made
to the
program, normally to circumvent an error.  Special versions are
not
general releases to all ANSYS licensees, since they typically
represent
errors occurring only on one system, a subset of our customers
who have
specific graphics devices, etc.

     The ANSYS revision identifier(s) shown under "corrected in"
on the
front side of this Class3 Error Report indicates the first
possible
revision that could contain the correction.  A major program
change
needed to fix an error can dictate that the next minor or major
revision
will contain the fix rather than the next correction level.  For
example,

when errors were being reported while Rev. 4.3A was the latest
production
version, most Class3 error reports indicated that 4.3B was the
"corrected
in" revision.  Others requiring significant code restructuring
were
reported as fixed in 4.4.  Rev. 4.3B was never released, but Rev.
4.4
contained all error corrections noted as fixed in 4.3B.

     An identifier indicated under "corrected in" does not
guarantee that
a general release of that revision of ANSYS will occur.  It does
indicate
that the correction is known and implemented in the coding that
would be
part of that general release.

                     Equivalent Product Identifiers

     The ANSYS family of component products occasionally
undergoes name
changes between revisions and/or changes in the functionality of
derived
products (such as ANSYS-PC/LINEAR).  To minimize the potential
for
confusion in these areas, the important product name equivalences
(similar program functionality and error content) are listed
below.


     ANSYS/ED       contains all errors      the full ANSYS
product,
                    shown for                starting at Rev.
5.0, and
                                             beyond, unless
otherwise
                                             noted.

     PREPPOST       contains relevant        the full ANSYS
product, for
                    errors shown for         included pre- and
                                             postprocessing
functionality

     ANSYS Component Products is an          All Component
products that
     inclusive term for                      were issued at the
stated
                                             revision level(s)

     PC/LINEAR      is equivalent to         WS/LINEAR at Rev.
4.4A,
                                        and  ANSYS/Linear Plus
starting
                                             at Rev. 5.0A.

     PC/THERMAL     is equivalent to         WS/THERMAL at Rev.
4.4A,
                                        and  ANSYS/THERMAL
starting at
                                             Rev. 5.0A.

     PC/MAGNETIC    is equivalent to         ANSYS/Emag starting
at Rev.
                                             5.0A

            ANSYS (Registered Trademark) CLASS3 ERROR REPORT

                                                       ERROR NO:
95-16

KEYWORDS:      ELEM3          ELEM4          LARGE DEFLECTION

DESCRIPTION OF ERROR:

     When using large deflections (NLGEOM,ON) with BEAM3 (the 2-D
elastic
beam element) or BEAM4 (3-D elastic beam element) together with a
zero
value of either bending moment of inertia (real constant IYY or
IZZ), the
results are incorrect.

FIRST INCORRECT VERSION(S):*_/          CORRECTED IN:*_/

Rev. 2.0                                Rev. 5.2
ANSYS/LinearPlus Rev. 5.0A              ANSYS/LinearPlus Rev. 5.2
ANSYS/ProFEA ASM Rev. 5.1               ANSYS/ProFEA ASM Rev. 5.2

SUGGESTED USER ACTION FOR RUNNING ON UNCORRECTED VERSION:

     Use a very small value for moment of inertia instead of a
zero
value.

COMMENTS:

     At Revision 5.2, this combination will not be allowed.

     BEAM3 and BEAM4 were referred to as STIF3 and STIF4
respectively,
prior to Rev. 5.0.  Large deflections were accessed with KAY,6,1
prior to
Rev. 5.0.

AUTHOR/CORRECTOR:                            DATE: 4/25/95
                    Peter Kohnke

REVIEWED BY QA:                              DATE: 4/25/95
                    Prashant Ambe

APPROVAL:                                    DATE: 4/25/95
                    David Conover

*_/If a product name is not included in the "first incorrect
version",
the full ANSYS program is implied.  For products not listed, this
error
does not apply, but see the reverse side for equivalent product
designations.

Unless noted otherwise, this error report also applies to all
revisions
after the first incorrect one and prior to the corrected
revision.  All
revisions after "corrected in" are corrected.  Manual corrections
are
included in on-line documentation as appropriate.  Please see the
reverse
side of this sheet for additional information on ANSYS revision
identifiers.

                                                  FORM SASI-QA25
                                                  DEC 19, 1988

            ANSYS (Registered Trademark) CLASS3 ERROR REPORT

                                                  ERROR NO: 95-17

KEYWORDS:   BOOLEAN    CUT    SUBTRACT    LCTA    ACTA    VCTA

DESCRIPTION OF ERROR:

     The solid modeling boolean "cut" commands do not create
separable
pieces.  For example, the command ACTA creates areas with a
common line
instead of two separate coincident lines as documented. 
Similarly, LCTA
creates lines with a common keypoint, and VCTA creates volumes
with a
common area.

     In most cases this error is obvious.  However, there may be
rare
instances where this error could lead to unanticipated results if
validation of boundary conditions and loads is bypassed before
solution,
by the user.

FIRST INCORRECT VERSION(S):*_/          CORRECTED IN:*_/

Rev. 5.0A                               Rev. 5.2
Component Products Rev. 5.0A            Component Products Rev.
5.2

SUGGESTED USER ACTION FOR RUNNING ON UNCORRECTED VERSION:

     In Rev. 5.1, replace all the solid modeling "cut" commands:
ACTA,
LCTA, and VCTA by the corresponding solid modeling command
"subtract"
commands: ASBA, LSBA, and VSBA, using the label with "sepo" in
field 3 of
the command.  Note that solid model entity numbering may be
different
when using subtract commands in place of cut commands.

COMMENTS:

     The ACTA, LCTA, and VCTA commands will be undocumented at
Rev. 5.2.

AUTHOR/CORRECTOR:                       DATE: 4/25/95
                    Yu-Hua Ting

REVIEWED BY QA:                         DATE: 4/25/95
                    Prashant Ambe

APPROVAL:                               DATE: 4/25/95
                    David Conover

*_/If a product name is not included in the "first incorrect
version",
the full ANSYS program is implied.  For products not listed, this
error
does not apply, but see the reverse side for equivalent product
designations.

Unless noted otherwise, this error report also applies to all
revisions
after the first incorrect one and prior to the corrected
revision.  All
revisions after "corrected in" are corrected.  Manual corrections
are
included in on-line documentation as appropriate.  Please see the
reverse
side of this sheet for additional information on ANSYS revision
identifiers.

                                                  FORM SASI-QA25
                                                  DEC 19, 1988

            ANSYS (Registered Trademark) CLASS3 ERROR REPORT

                                                  ERROR NO: 95-18

KEYWORDS:      ELEM106        VISCO106       CENTROID RESULTS

DESCRIPTION OF ERROR:

     For VISCO106 (the 2-D large strain solid), printed
centroidal values
of PSV, PLWK and EPTO may be incorrect.  These values are printed
as part
of the element solution if requested by the OUTPR, ESOL command.

FIRST INCORRECT VERSION(S):*_/               CORRECTED IN:*_/

Rev. 5.0                                     Rev. 5.2

SUGGESTED USER ACTION FOR RUNNING ON UNCORRECTED VERSION:

COMMENTS:

     Postprocessing is not affected by this error.

AUTHOR/CORRECTOR:                            DATE: 4/25/95
                    Tim Pawlak

REVIEWED BY QA:                              DATE: 4/25/95
                    Prashant Ambe

APPROVAL:                                    DATE: 4/25/95
                    David Conover

*_/If a product name is not included in the "first incorrect
version",
the full ANSYS program is implied.  For products not listed, this
error
does not apply, but see the reverse side for equivalent product
designations.

Unless noted otherwise, this error report also applies to all
revisions
after the first incorrect one and prior to the corrected
revision.  All
revisions after "corrected in" are corrected.  Manual corrections
are
included in on-line documentation as appropriate.  Please see the
reverse
side of this sheet for additional information on ANSYS revision
identifiers.

                                                       FORM
SASI-QA25
                                                       DEC 19,
1988

            ANSYS (Registered Trademark) CLASS3 ERROR REPORT

                                                       ERROR NO:
95-19

KEYWORDS:  DAMPING   UNSYMMETRIC MATRICES    ELEM4    ELEM16   
ELEM27

DESCRIPTION OF ERROR:

     When using unsymmetric damping matrices, the reaction forces
are
incorrect.  Unsymmetric damping matrices occur when using:

          BEAM4 with KEYOPT(7)=1
          PIPE16 with KEYOPT(7)=1
          MATRIX27 with KEYOPT(2)=1 and KEYOPT(3)=5.

     For BEAM4 and PIPE16, the effect of this error on the
skew-symmetric
damping matrix causes the damping forces (output with OUTPR,NLOAD
and
OUTRES,NLOAD) to have the incorrect sign.

FIRST INCORRECT VERSION(S):*_/          CORRECTED IN:*_/

Rev. 4.2 (MATRIX27)                     Rev. 5.2
Rev. 5.0 (BEAM4 and PIPE16)

SUGGESTED USER ACTION FOR RUNNING ON UNCORRECTED VERSION:

COMMENTS:

     BEAM4, PIPE16, and MATRIX27 were referred to as STIF4,
STIF16, and
STIF27 respectively, prior to Rev. 5.0.  STIF4 and STIF16 did not
have an
unsymmetric damping matrix capability (KEYOPT(7)=1) prior to Rev.
5.0.

AUTHOR/CORRECTOR:                       DATE: 4/25/95
                    Peter Kohnke

REVIEWED BY QA:                         DATE: 4/25/95
                    Prashant Ambe

APPROVAL:                               DATE: 4/25/95
                    David Conover

*_/If a product name is not included in the "first incorrect
version",
the full ANSYS program is implied.  For products not listed, this
error
does not apply, but see the reverse side for equivalent product
designations.

Unless noted otherwise, this error report also applies to all
revisions
after the first incorrect one and prior to the corrected
revision.  All
revisions after "corrected in" are corrected.  Manual corrections
are
included in on-line documentation as appropriate.  Please see the
reverse
side of this sheet for additional information on ANSYS revision
identifiers.

                                                  FORM SASI-QA25
                                                  DEC 19, 1988

            ANSYS (Registered Trademark) CLASS3 ERROR REPORT

                                                  ERROR NO: 95-20

KEYWORDS:      ELEM16,17,18        ELEM20,59,60        STRESS
EXTREMES

DESCRIPTION OF ERROR:

     The stress extremes (S1MX, S3MN, SINTMX and SEQVMX) for
elements
PIPE16,17,18,20.59 and 60 are incorrect for some problems having
bending
and shear stresses of similar magnitude.

FIRST INCORRECT VERSION(S):*_/          CORRECTED IN:*_/

Rev. 5.0                                Rev. 5.2
ANSYS/LinearPlus Rev. 5.0A              ANSYS/LinearPlus Rev. 5.2
     (ELEM16,17,18 only)

SUGGESTED USER ACTION FOR RUNNING ON UNCORRECTED VERSION:

     Estimate the extreme stresses from the stresses printed out
at each
45 degree location around the circumference at each end of each
pipe
element.

COMMENTS:

     In our experience, the errors tend to be relatively small
(of the
order of 10%), and rare (only one of over 200 tests using these
elements
showed the error).

AUTHOR/CORRECTOR:                       DATE: 4/25/95
                    Cecil R. Rogers

REVIEWED BY QA:                         DATE: 4/25/95
                    Prashant Ambe

APPROVAL:                               DATE: 4/25/95
                    David Conover

*_/If a product name is not included in the "first incorrect
version",
the full ANSYS program is implied.  For products not listed, this
error
does not apply, but see the reverse side for equivalent product
designations.

Unless noted otherwise, this error report also applies to all
revisions
after the first incorrect one and prior to the corrected
revision.  All
revisions after "corrected in" are corrected.  Manual corrections
are
included in on-line documentation as appropriate.  Please see the
reverse
side of this sheet for additional information on ANSYS revision
identifiers.

                                                  FORM SASI-QA25
                                                  DEC 19, 1988

Table "ANSYS 5.1  CLASS3 ERROR SUMMARY BY REPORT NUMBER", 1 page,
omitted.

Table "ANSYS 5.1  CLASS3 ERROR SUMMARY, KEYWORD SORT OF ALL
REVISION 5.1
CLASS3 ERRORS, Date of this report: 4/25/95", 4 pages, omitted.

Table "ANSYS 5.0A  CLASS3 ERROR SUMMARY BY REPORT NUMBER", 4
pages,
omitted.

Table "ANSYS 5.0A CLASS3 ERROR SUMMARY, KEYWORD SORT OF ALL
REVISION 5.0A
CLASS3 ERRORS, Date of this report: 4/25/95", 14 pages, omitted.

*** END OF DOCUMENT ***

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